PUREGAS, LLC
P550W2 Series Air Dryers User’s Guide
Page 92 of 99
P012226 – Rev. F
13.17 High Duty Cycle Alarm
Possible Cause
Check
Corrective Action
Low System Pressure
Verify System Pressure
(section 8.9 )
Adjust System Pressure
(section 8.9 )
High Flow condition
Verify Flow Rate
(
FLOW
) reading is not
higher than expected
(section 8.5.5.2 )
Troubleshoot High Flow
condition
(section 13.11 )
Defective Unloader
Valve
Test Unloader Valve
operation (section 9.7 )
If this is continuously
flowing high amounts of
air, the Unloader Valve
is defective.
Replace Unloader Valve
(section 11.3 )
Defective Heatless
Dryer Solenoid Valve
Verify consistent
Heatless Dryer cycling
(section 9.6 )
If either side is
continuously flowing
high amounts of air, the
Solenoid Valve is
defective.
Replace Solenoid
Valves included in the
8,000 Hour Maintenance
Kit (section 11.4 )
Defective control board
Measure voltages at
control board
(section 9.3 )
If measurements are
incorrect, replace
control board (section
11.1 )
13.18
Can’t Create a High Duty Cycle Alarm
Possible Cause
Check
Corrective Action
High Duty Cycle Alarm
set point too high
Verify High Duty Cycle
Alarm set point (section
8.7.5 )
Allow the compressor to
run longer than it is off.
(section 9.11 )
Defective Control Board Verify that the
compressor has run
more than the verified
High Duty Cycle Alarm
set point (above)
Replace Control Board
(section 11.1 ) if the
compressor runs more
than the verified High
Duty Cycle Alarm set
point and fails to create
an alarm.
Summary of Contents for P550W2 Series
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